These compatible ink cartridges for the Canon PIXMA MP640 are backed by a quality and satisfaction guarantee! Quality inkjet cartridge replacements and best value for your Canon PIXMA MP640. Why buy an original ink cartridge for your Canon PIXMA MP640 when you can get perfect quality out of a brand new generic inkjet cartridge at a fraction of the cost? We guarantee that they will print with the same high quality as your genuine Canon brand cartridges or your money back! We also offer other discount Canon PIXMA MP640 printer supplies as shown below.